Insulator-support.



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' TO H'UBBARD & CO., 0F PITTSBURGH, PENNSYLVANA, il. CQRPORATION 0F PENN- SYLVAIT'IA.

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To all 'whom it may concern.

Be it known that l, CHARLES L. llame-a, Jr., a. citizen of the United States, and a resident of Pittsliurgh, in the county or Allegheny and State or' lennsx'g/lvania, have invented. certain new and uset'ul 1improvements in Insulator-Supports, of' which the following is a specification.

My invention relates to insulator supports which are stronger and more practical and. ellcient than insulator supports heretofore used.

My invention relates particularly to insulator supports comprising a bracket mem1 ber and-a thimble structure secured thereto. Heretoifore bracket members have been formed up from metal stock shapes such a channel bar, and thimble structures" applied to the ends thereof. y lThe parts oli-the thimble structures which receive the insulators must be of cirular cross-Section but when such structures are applied to bracket members of stock material thebase parts oi the thimbles must be bent to fit the contour and angles of the bar and this o course w aliens the support at 'the Very section where it should bev strongest. -Vllhere the thimble': structures are sectional in order to yield radially when an insulator' is applied jdie sections are apt to bend permanently if 'the cylindrical form or circular cross-section be low the thimble structure threads has been destroyed by bendingv the insulator struf'ti'ire to tit the bracket member end. ln other words, circular cross-section througl'iout the thimble structure will give the greatest strength and if such circular cross-section is in any wise destroyed the thimble sti-uey ture and the entire support will be corre spondingly weakened.

The "acket member itself, when bent up 'from stock material has its disadvantages.. In the first placethe stock must be taken as it isand the desired strength at one tion cannot be obtained without too much stock at some other section, and consequently over-,weight and waste. ln the second place.,y when the support is formed up of stock material, for example channel y bar, and the thimble structure is bent te tit, 'there will be sharp edges and corners on which 'Wires couldl chate or get caught.

The object of my invention is owmoanel the disadvantages of the above ref structures and to produce an insulti.

or si Specification of Letters Patent.

Patented Sept. 12, 191.6.

Serial No. 76,302.

.conical scat for a thinible structure also Jformed up 'from iat sheet metal and ofc-ir- Cular section throughout. Such construe tion will insure the greatest strength where it is most needed, namely, at the base of the tliimbie structure threads and adjacent the end of the bracket member to which the thimble structure is secured, and such circular eross-section throughout the insulator structure will also prevent permanent bending'Y of the insulator structure sections.

Un the accompanying drawing l. sho an insulator support which embodies the yarious features of my invention.

On this drawing- Figure l is a side clevational view of' the support, Fig. 2 is a front elevational view., Fig. 3 is a sectional View on plane. 3i-*3, Fig. 2, Figff is a sec-A tional view on plane l-eh Fig. l, and Fig'. 5

`is a perspective View showing one manner of applying' the insulator support to a supporting base.

The insulator support shown comprises a bracket member B and a. thimble structure' T. The bracket member shown is or' U-shape and is bent u1 entire from a single piece of flat sheet metal stock to be of arched crosssection. rllhe bracket member throughout its body part l0 is open, that is, the limbs ll and lf2 are. separated at their ends and nay be parallel as shown or at angles with each other. At the oute end of the body part the limbs ll. and 12 are brought together 'to form a seat oi'i circular cross-section 'f ceiving the thimble structure T. The thimble structure shown of circular crosssection throughout and is formed up from a single piece of flat sheet metal in which threads 13 are stamped. rlhe lower end oi" the thimble intimately ts the cylindrical sides of the lbracket member end e and is secured to such end in any suitable manner as by means of a rivet or rivets ll.

snlator the ends thereof fall short of closure te leere a gap l5. [as shown, the thimble is p lied to the enc c with the gap m register 'fritti the jointure y of he bent in vlimbs lf. s'.

i. and la and the eri-ll and the rivet passes through the thimble and end at right angles to thejointure as clearly show n in Figs. 2 and 4. It is evident that the thimble could be placed on the end to overlap the jointure j. iVith the above arrangement involving the circular seat for the thimble structure and the thimble structure of circular crossthe full elasticity of the thimbleand Will prevent permanent bending or give of the thimble when an insulatorl is applied, and after application. of the insulator the conl tracted thimble will by its spring and elasticity securely clamp the insulator in place.

Any suitable arrangement may be provided for securing the support to a wall,-

pole or other Vsupporting structure. As shown in Figs. 1 and 2, ears 18and r19 are' formed integral at the inner end, of the bracket member and have bolt hole's20 and 21 respectively. Instead of being secured individually to supports, a number of brackets could be mounted on a common support. In Fig. 5 such arrangement js shown. The o pen arched backs of the bracket members B saddle over an arched frame 22 andstraps 23 arch over each bracket. and are secured thereto and to the frame by riveting 24, the

strap havingv the wings or flanges 25 and 26 provided with bolt holes 27 by means of'v which the frame 22 with the various brackets thereon may be secured to a Wall or pole.

In the insulator support described thereis pno waste of metal or over-Weight. The

blanks for the bracket member and thimble structure are accurately dimensioned before forming in accordance with the desired strength and are then bent into such form as will result in the greatest strength. The arch section bracket member is open outwardly leaving the rounded arch surface on the inner side so that it will be impossible for wires to chate or catch.v Likewise, the thimble receiving end being circular and free of corners, there will be no-chance for wires to chafe or get caught at such end or on the thimble structure.

I do not of course desire to be limited to the4 precise construction and arrangement shown as modifications may be possible which would still come within the scope of the invention.

I claim yas follows:l

1 An insulator support consisting of a bracket member formed up entire from a single piece of flat sheet metal and having 4an end of circular cross section, yand a threaded thimble structure of circular crosssection throughout formed up entire from a single piece of sheet metal, said thimble structure intimately fitting said circular end and lsecured thereto.

2. An insulator support consisting of a bracket member and a thimble, said bracket member being formedup from a single piece y of flat sheet metal and having an end of'circircular cross-section formed up from y a single piece of Asheet metal, said thimble intimately fitting said bracket member end and secured thereto and having'a gap for adapting it for radial contraction.

3. An insulator. support consisting of a bracket member and a thimble, said bracket member being formed up entire from a single piece of flatsheet metal and comprising an open body of arch cross-section anda closed end of` circular cross-section, said vthimble being of circular cross-section and 4formed u from a single piece of sheet metal, the base of said thimble intimately fitting said bracket member. end and secured thereto and there being a gap in said thimble for adapting it for radial contract-ion.

4; An insulator support consisting of a bracket member and a thimble, said bracket member being formed up from a single )ieee of fiat sheet metal and havin an end oi circular cross-section, said thim le being a single piece of sheet metal ybent up to be of circular cross-section throughout and with its ends slightly separated to leave a gap, the base of said thimble intimately receiving the bracket member circular end and secured thereto, said gap permitting radial contraction of the thimble during application of an insulator thereto.

5. An insulator support comprising a U- shaped bracket member and a thimble, said bracket member being stamped up integral from a single piece of comparatively heavy flat sheet 4metal to arch shaped cross-section throughout except at the outer end where the cross-section is circular to form a cylindrical seat, said thimble being stamped integral from a piece .of thinner sheet metal and of circular crosssection throughout, the

ing the cylindrical end of the bracket member and being secured thereto, the upper end of the thimble having threads pressed therein for receiving an insulator'.

In witness whereof I hereunto subscribe my name this 1st day of February, A. D., 1916.

CHARLES L. IEIRCE,-Jn.

cular cross-section, said thimble. being ofthroughout and lower end of said thimble intimately receiv- 

